CN2834884Y - High-frequency heat sealing machine - Google Patents
High-frequency heat sealing machine Download PDFInfo
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- CN2834884Y CN2834884Y CN 200520027142 CN200520027142U CN2834884Y CN 2834884 Y CN2834884 Y CN 2834884Y CN 200520027142 CN200520027142 CN 200520027142 CN 200520027142 U CN200520027142 U CN 200520027142U CN 2834884 Y CN2834884 Y CN 2834884Y
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Abstract
The utility model discloses a high-frequency heat sealing machine which can shield electromagnetic radiation and effectively prevents breakdown fire strike. The end part of an upper pole plate of the utility model is fixedly provided with a positioning column. The middle part of the upper pole plate is connected with a cross-shaped cutter frame. An adjusting screw rod travels through a fixing frame of the upper pole plate, and is connected with the cross-shaped cutter frame. The lower part of the cross-shaped cutter frame is fixedly connected with a mold. The lower part of the mold is provided with a lower pole plate. Both sides of the lower part of the lower pole plate are provided with springs which are respectively fixed on a tackle base plate. The lower part of a tackle is provided with a slide way. Both sides of a shielding body are connected with both sides of the slide way. Both sides of the upper part of the shielding body are respectively and fixedly provided with insulative support elements which are connected with fire wire conductive sheets. The fire wire conductive sheets are connected with a constant current power supply. The utility model can completely shield high-frequency electromagnetic fields, and effectively prevents the phenomenon of breakdown fire strike.
Description
Technical field
The utility model relates to the secondary operations apparatus field of plastic foil, in particular, relates to that a kind of radiation is low, does not puncture the high-frequency thermocompressor of sparking between electrode.
Background technology
Traditional high-frequency thermocompressor its high frequency source, particularly working electrode (mould) with and lead-in wire local or all expose in the space.The electromagnetic field that high frequency electric produced have no to stop to space radiation, form an interference source hugely, the grievous injury operator's is healthy, electronic equipment around disturbing is as equal cisco unity malfunction such as television set, radio, landline telephone, radio communication, computer, electronic instrument.
The paper that is entitled as " shielding is to reducing the study on the efficiency that operation tool is exposed to the dielectric heater high frequency radiation " was arranged before more than 10 year, also proposed multiple effective shielding design, and this design is quoted repeatedly in " using the security regulations of high-frequency dielectric heater wrapper " that Geneva international labourer office publishes; But should design the validity of only simple consideration shielding, and ignore the inconvenience that shielding brings practical operation, so worldwide there is not a tame manufacturer to adopt this design so far.
The last compact dimensions of high-frequency plastic welder workpiece is subjected to the influence of many factors, as fluctuation of operating pressure, heat time heating time, material thickness, material, line voltage etc., even if also there are discreteness in its thickness of same batch of material and dielectric loss; Particularly the fluctuation of line voltage brings the fluctuation of high frequency power, finally influences compact dimensions.Present solution is that the dependence operative employee carries out adjustment at random, the operative employee relies on perusal, judge the heat seal result by rule of thumb, make the decision that shifts to an earlier date or delay end heat seal process then, just blocked operative employee's sight line if adopt full-shield, and can't regulate and control, not only uncomfortable, and can't guarantee consistency of product.
Heat-sealing machine belongs to the medium heating, and load is capacitive, in order to obtain high frequency power on capacity load, employing series resonant circuit without exception.Sort circuit can become resistive load to capacity load, and the advantage of this design is to be easy to reach coupling, but the fatal shortcoming that its exists is: the first, and the variation slightly of thickness of workpiece will cause the great changes of output current (or voltage); Second, workpiece is thin more often, voltage is high more, and the resistance of workpiece is worn intensity and is directly proportional with the thickness of workpiece, so closing on when finishing, it is the thinnest that thickness of workpiece reaches, it is minimum that intensity is worn in resistance, and operating voltage is near the highest, and be in the state of rapid increase, so operating voltage is easy to wear intensity above the resistance of workpiece, thereby take place to puncture sparking, burn out workpiece and mould.Puncturing sparking is the major defect that present heat-sealing machine exists, and spark restrain device of the prior art is a kind of remedial measure, is to puncture the sparking back in generation to cut off the positive stream of electron tube at a high speed, to reduce the loss that sparking causes.But cut off sun stream from detecting to puncture, this process no matter how soon, also need some times, moreover the high-frequency energy that is stored in resonator and inductance capacitor element will discharge in the spark mode, so also can't eliminating fully, good again supression device punctures the loss that brings, just relatively reduce, and the effect of restraining device thickens with the increase workpiece of power and descend, and restrain the possibility that also there is inefficacy in device itself.
The utility model content
Technical problem to be solved in the utility model is, provide a kind of can electromagnetic radiation shielding, effectively prevent to puncture the high-frequency thermocompressor of sparking.
The utility model high-frequency thermocompressor, be achieved by following technical proposals, cylinder is connected with the top crown fixed mount by the guide shaft guide pin bushing, top crown is fixed in the fixed mount, described fixed mount both sides are respectively arranged with coaster, described top crown end is fixed with reference column, the top crown middle part connects the cross knife rest, adjusting screw(rod) passes the top crown fixed mount and is connected with the cross knife rest, the fixedly connected mould in described cross knife rest below, described mould below is provided with bottom crown, and both sides, bottom crown below are provided with spring, described spring is individually fixed in the coaster chassis, described coaster below is provided with slideway, and the shield both sides are connected with the slideway both sides, and both sides, described shield top are fixed with an insulation part respectively, described insulation is propped up part and is connected live wire conductive, and live wire conductive connects constant-current supply.
Cross knife rest described in the utility model is connected with top crown by top crown guide shaft guide pin bushing.Described top crown fixed mount screw position is provided with index dial.The bottom connects pulley in the described coaster, and the pulley top is provided with spring.Be provided with elastic conducting strip between described coaster and top crown regulation frame.
The utility model top crown is the top of metallic shield, coaster constitutes the middle part of metallic shield, slideway and be fixed on the bottom that shield below the slideway constitutes metallic shield, constitute the complete shield of working position after the three part closures, die workpiece, live wire conductive all are sealed in wherein, and such structure can shield the electromagnetic field of high frequency fully.Output loop breaks away from the series resonance state, and constant pressure source output has been changed into constant-current source output.As long as the heat seal resistance that operating voltage is no more than workpiece when beginning is worn intensity spark phenomenon just can not be taken place to puncture.
Description of drawings
Fig. 1 is the utility model structure cutaway view;
Fig. 2 is the utility model high frequency source structural representation.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, cylinder 1 is connected with top crown fixed mount 2 by guide shaft guide pin bushing 3, top crown 7 is fixed in the fixed mount 2, the fixed mount both sides are respectively arranged with coaster 15, four ends of top crown lower surface are fixed with reference column 12 respectively, the fixedly connected cross knife rest 8 in top crown middle part, adjusting screw(rod) 5 passes top crown fixed mount 2 and is connected with cross knife rest 8, top crown fixed mount 2 screw positions are provided with index dial 6, cross knife rest 8 is connected with top crown by top crown guide shaft guide pin bushing 4, the fixedly connected mould 9 in cross knife rest 8 belows, and mould 9 belows are provided with bottom crown 13, both sides, bottom crown 13 below are provided with spring 14, spring is individually fixed in the coaster chassis, and coaster 15 belows are provided with slideway 19, and 2 of coaster 15 and top crown fixed mounts are provided with elastic conducting strip 18, the bottom connects pulley 17 in the coaster 15, pulley 17 tops are provided with support spring 10, and shield 20 both sides are connected with the slideway both sides, and the connection of shield can be adopted screw, or rivet, preferably welding; Both sides, shield 20 top are fixed with an insulation part 22 respectively, and an insulation part 22 connects live wire conductive 23, and live wire conductive connects constant-current supply 24.
Cylinder makes top crown and the cross knife rest and the mould reference column that are fixed on top crown do upper and lower elevating movement, and workpiece is applied operating pressure.Top crown rises when not heating, and disengages with being fixed on supratrochlear elastic conducting strip, and the pressure on the bottom crown is removed.Bottom crown rise under the effect of spring with coaster above be in a plane, and coaster all the other positions except that four sheaves all disengage with slideway and elastic conducting strip, bottom crown also disengages with an insulation part.This coaster be about two, pull out the pendulum workpiece, push in heating, two coaster alternations.Top crown descends during heating, and under pressure, bottom crown contacts with an insulation part, and does to electrically contact with live wire conductive.Under the effect of pressure do, the sheave pinch in, coaster and slideway are done and are electrically contacted.Coaster and slideway are frame type, and wherein coaster constitutes the middle part of metallic shield.Top crown is the top of metallic shield, slideway and be fixed on the bottom that shield below the slideway constitutes metallic shield.Constitute the complete shield of working position after above-mentioned top, middle part, the bottom three part closures, die workpiece, live wire conductive all are sealed in wherein, also conductively-closed of the electromagnetic field of high frequency that they produced.The electromagnetic field of shield external leakage is very faint.
Wherein four reference columns relative position of guaranteeing upper and lower pole plate is constant, and parallel.The guide shaft guide pin bushing guarantees that then cross knife rest (containing mould) and top crown do parallel motion.Rotate to regulate bolt and can change the distance of cross knife rest and bottom crown, with the mould that adapts to differing heights and the workpiece of different-thickness.Regulating the bolt top has circular index dial, and periphery is divided into 100 equal portions, and the moving distance that was once equaling between mould and bottom crown of revolution changes one of percentage of pitch.This structure is equivalent to the plane moding of usefulness has usually been become three-dimensional mould.The compact dimensions of workpiece depends on machining accuracy, and is irrelevant with other factors.Sister block can be made in the working position, also can make single pulley, maybe can be for fixed.This machine can be the single head machine, also can be the double end machine.The lifting of wherein going up shield and be top crown can be pneumatic, hydraulic pressure, electronic or make foot-operated.Wherein elastic conducting strip also can be the conduction flexible glue.
High frequency source, working electrode (mould) workpiece, and brace all places in the metallic shield body.Simultaneously the gap between mould and the pole plate is set in advance with mechanical means, this gap is exactly the thickness behind the Workpiece shaping.When the precalculated position is arrived in heat seal, bear whole pressure by mechanical positioner, no longer be stressed on the workpiece, then no longer attenuation of the thickness of workpiece, so the last molding thickness of workpiece is only relevant with predefined size, and irrelevant with other factors.In other words, exactly the two-dimensional space mould of the common usefulness of heat-sealing machine is become three dimensions mould (three-dimensional mould).Need not the operative employee in operating process observe and regulate and control, not only prevented high frequency radiation, and guaranteed consistency of product and reduced technical ability requirement the operative employee.
As shown in Figure 2, inner chamber body 33, middle cavity 32 and high frequency source metallic shield body 31 are formed coaxial resonator, install electron tube 34 additional and constitute radio-frequency generator; Radio-frequency generator is made of the inner chamber body 33 that sets gradually from the inside to the outside, middle cavity 32, high frequency source metallic shield body 31 and the electron tube 34 that passes above-mentioned cavity, constant current output by be arranged at live wire conductive 38 in the high frequency source metallic shield body 31 be connected and fixed electric capacity 35,36, and variable capacitance 37 form, but fixed capacity 35,36 is connected with middle cavity 32 by ethene pillar 39, live wire conductive 38 connects variable capacitance 37 and forms output loop with fixed capacity 35,36, regulates variable capacitance and can regulate power output.High-frequency energy from ground wire draw the cover and live wire conductive output on the working electrode.The above-mentioned connection that is illustrated as the high frequency source that is applicable to the single head machine, for adapting to the double end machine, the connection of above-mentioned high frequency source can be set to radio-frequency generator in the centre, and constant current is exported on both sides.Its high frequency source casing is that high frequency source metallic shield body can be the square chest type, also can be cylindrical shape.
Output loop breaks away from the series resonance state, and constant pressure source output has been changed into constant-current source output.Power P=I in the load
2R, the voltage U=IR in the load be that power or voltage all are directly proportional with the impedance of load, and the impedance of load is directly proportional with the thickness of workpiece, is directly proportional so the operating voltage on the workpiece is worn intensity with the resistance of workpiece.To wear intensity the highest for thickness of workpiece and resistance when heat seal begins, and power and the voltage of this moment are also the highest, and thickness of workpiece and resistance subsequently worn intensity and descended, and operating voltage descends thereupon; When thickness of workpiece was tending towards leading, voltage also went to zero.As long as the heat seal resistance that operating voltage is no more than workpiece when beginning is worn intensity spark phenomenon just can not be taken place to puncture.
Same workpiece, under the condition that does not puncture sparking, the thickness after maximum power density depends on Workpiece shaping in the working environment of constant pressure source; In the environment of constant-current source, maximum power density depends on the thickness of workpiece when heat seal begins, and obviously the latter is greater than the former.So constant-current source not only can prevent to puncture sparking than constant pressure source, and can obtain bigger power density, can obtain process velocity faster.
Because the element of band high-frequency and high-voltage all is sealed in the metallic shield body, the operative employee can not touch, and also no longer there is the danger of contact burn in the operative employee.
Claims (6)
1. high-frequency thermocompressor, cylinder is connected with the top crown fixed mount by the guide shaft guide pin bushing, top crown is fixed in the fixed mount, described fixed mount both sides are respectively arranged with coaster, it is characterized in that, described top crown end is fixed with reference column, the top crown middle part connects the cross knife rest, adjusting screw(rod) passes the top crown fixed mount and is connected with the cross knife rest, the fixedly connected mould in described cross knife rest below, described mould below is provided with bottom crown, and both sides, bottom crown below are provided with spring, described spring is individually fixed in the coaster chassis, described coaster below is provided with slideway, and the shield both sides are connected with the slideway both sides, and both sides, described shield top are fixed with an insulation part respectively, described insulation is propped up part and is connected live wire conductive, and live wire conductive connects constant-current supply.
2. high-frequency thermocompressor according to claim 1, it is characterized in that, described constant-current supply comprises radio-frequency generator and constant current output, described radio-frequency generator is made of the inner chamber body that sets gradually from the inside to the outside, middle cavity, high frequency source metallic shield body and the electron tube that passes above-mentioned cavity, described constant current output by be arranged at live wire conductive in the high frequency source metallic shield body be connected and fixed electric capacity, and variable capacitance forms, variable capacitance passes through the ethene pillar and is connected with middle cavity.
3. high-frequency thermocompressor according to claim 1 is characterized in that, described cross knife rest is connected with top crown by top crown guide shaft guide pin bushing.
4. high-frequency thermocompressor according to claim 1 is characterized in that, described top crown fixed mount screw position is provided with index dial.
5. high-frequency thermocompressor according to claim 1 is characterized in that, the bottom connects pulley in the described coaster, and the pulley top is provided with support spring.
6. high-frequency thermocompressor according to claim 1 is characterized in that, is provided with elastic conducting strip between described coaster and top crown regulation frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520027142 CN2834884Y (en) | 2005-08-26 | 2005-08-26 | High-frequency heat sealing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520027142 CN2834884Y (en) | 2005-08-26 | 2005-08-26 | High-frequency heat sealing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2834884Y true CN2834884Y (en) | 2006-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520027142 Expired - Fee Related CN2834884Y (en) | 2005-08-26 | 2005-08-26 | High-frequency heat sealing machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN2834884Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103419362A (en) * | 2013-08-12 | 2013-12-04 | 苏州华日金菱机械有限公司 | High-frequency thermoforming machine capable of adjusting a die to be horizontal automatically |
| CN103419363A (en) * | 2013-08-12 | 2013-12-04 | 苏州华日金菱机械有限公司 | High-frequency thermoforming machine monitoring levelness of die automatically |
| CN103448240A (en) * | 2013-08-12 | 2013-12-18 | 苏州华日金菱机械有限公司 | High-frequency heat sealing machine capable of automatically adjusting current |
| CN109263052A (en) * | 2018-09-03 | 2019-01-25 | 夏敏月 | A kind of plastic film heat sealing machine |
-
2005
- 2005-08-26 CN CN 200520027142 patent/CN2834884Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103419362A (en) * | 2013-08-12 | 2013-12-04 | 苏州华日金菱机械有限公司 | High-frequency thermoforming machine capable of adjusting a die to be horizontal automatically |
| CN103419363A (en) * | 2013-08-12 | 2013-12-04 | 苏州华日金菱机械有限公司 | High-frequency thermoforming machine monitoring levelness of die automatically |
| CN103448240A (en) * | 2013-08-12 | 2013-12-18 | 苏州华日金菱机械有限公司 | High-frequency heat sealing machine capable of automatically adjusting current |
| CN109263052A (en) * | 2018-09-03 | 2019-01-25 | 夏敏月 | A kind of plastic film heat sealing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061108 Termination date: 20130826 |